Inside Macintosh: 3D Graphics Programming With QuickDraw 3D /

Chapter 4 - Geometric Objects / Geometric Objects Reference

Data Structures

Lines

A line is a straight segment in three-dimensional space defined by its two endpoints, with an optional set of attributes. (In addition, each vertex can have a set of attributes.) A line is defined by the TQ3LineData data type. See "Creating and Editing Lines," beginning on page 4-63 for a description of the routines you can use to create and edit lines. Figure 4-10 shows a line.

Figure 4-10 A line

typedef struct TQ3LineData {
   TQ3Vertex3D                vertices[2];
   TQ3AttributeSet            lineAttributeSet;
} TQ3LineData;

Field Description

vertices

An array of two vertices.

lineAttributeSet

A set of attributes for the line. The value in this field is NULL if no line attributes are defined.